Door-hinge.



L. DODGE.

DOOR HINGE. APPLlC-AHON FILED MAR. 7. I918.

Patented Jan. 21, 1919.

WITNESSES' ATTORNEY LYMAN DODGE, OF NEWBUBYPORT, MASSACH'U'SETTS.

DOOR-HINGE.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Application filed March 7, 1918. Serial No. 221,025.

To all whom it may concern:

Be it known that I, LYMAN Donor, a citizen of the United States, residing at Newburyport, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Door-Hinges,

of which the following is a specification.

insure the smooth operation of the same when returning the door to closed position after the same has been opened thus preventing any jarring action as the door descends from its open or elevated position.

Other objects of the invention as well as theconstruction and arrangement of the several parts thereof will be more readily understood from the following description and accompanying drawings in which draw- %igure 1 is a side elevation of my improved hinge in applied position.

Fig. 2 is an edge view of the same, and

Fig. 3 is a side elevation partly in section.

In the drawings wherein I have shown my invention in its preferred embodiment I have used the numeral 1 to designate a stationary support such as the wall of a room or a building and 2 a door to be hingedly connected to said support. The hinge WhlCh comprises the sub ect matter of t 6 present invention includes a leaf or plate 3 which is adapted to be attached "to the support 1 and is provided with the usual knuckle 4. This knuckle 4 is provided with a socket 5 which pens into its upper end and is adapted .eceive the educed lower end 6 of a pintle 7. This pintle 7 has a spirally twisted groove 8 extending upwardly along its entire length. A second plate indicated at 9 is adapted to be attached to the door and this plate is likewise provided with a knuckle 10 which is adapted to receive the pintle 7 and rests upon the upper end of the knuckle 4. This knuckle 10 1s provided with an integral enlargement 11 hich is equipped with a threaded bore forming a socket for the reception of a set screw 12. This set screw 12 is formed with an enlarged threaded shank 13 whichis adapted to be received in the bore of the enlargement 11 and this shank opposite the head is reduced as at 14 to receive a friction roller 15. The set screw is normally arranged aS shown in Fig. 3 with the friction roller 15 projecting into the interior of the knuckle 10 and posit-ioned between-the opposite walls of the spiral groove 8.

In the operation of the hinge" assuming that the friction roller 15 is engaged with the groove 8 as shown in Fig. 3, it will be obvious that as the door 2 is moved outwardly or opened this roller will travel up-' wardly along the spirally twisted groove thus causing the knuckle 10 to ride up upon the pintle 7 and elevate the door. When the door is released the weight of the same will cause the friction roller to travel downwardly along the inclined groove and will thus automatically return to a closed position. When, however, it is desired to use the hinge as an ordinary hinge it is merely necessary to turn the set screw in a direction to withdraw the friction roller from engagement with the spiral groove.

Having shown only a preferred embodi: ment of my invention it will be understood that I do not limit myself to the exact details of construction and arrangement shown thereby, but reserve the right to make such alterations as I deem advisable provided of course that the same follow within the scope of the appended claims and do not depart from the spirit of the invention.

I claim 1. A hinge, comprising a pair of plates, knuckles carried by said plates, a pintle carried by one of said knuckles and adapted to be received in the other knuckle, said pintle beingprovided with a spirally twisted groove, a set screw carried by said last memtioned knuckle, and a friction roller secured to said set screw and adapted to travel in said groove.

2. A hinge, comprising a pair of plates, knuckles formed on said plates, a pintle carried by one of said knuckles and adapted to be received in the other knuckle, said pintle being equipped with a spirally twisted groove, an enlargement formed on sald last mentioned knuckle and provided with an interiorly threaded bore, a set screw engaged in said bore, and a friction roller carried by the inner end of said set screw, and adapted tovtmvel in said slot.

3. A hinge, comprising a pair of plates, knuckles formed on said plates, :1 pintle carried by one of said knuckles and adapted to be received in the other lnniekle, said pintle being provided with a spirally twisted groove, a socket integral with said last mention d knuckle a, set screwthreaded into said socket, ovided With a reduced e);- tension and a friction roller rotatebly mounted upon said extension and adapted to travel in. said. groove.

4, A hinge comprising a pair of hinge plates, a knuckle carried by one of said plates and equipped with a socket opening into one end thereof, a pintle having one end redueed and. disposed in said socket and provided with a spiral groove extending-from the reduced end to the opposite end the of, a second knuckle carried by the remaining hinge plate and surrounding the grooved portion of said pintle, and a roller carried by said second knuckle and mounted to rota'te in said groove.

5. A hinge comprising knuckles, a pin'tle carried by said lower knuckle and fitting into said upper knuckle, said pintle being provied with a spiral groove extending the full length of said upper kn'uokle, a pin extending trenswrsely through the upper knuckle and provided on its inner end with a roller adapted to tra wel in said groove, said pin and roller being late ell removable through the upper knuekle to permit separation of said knuckle In testimony whereof I affix my signature 1n presence of two witnesse LYMAN DODGE Witness-5e CARL {l Emmy, Ennis e. Len-inner.

upper end lowerv 

